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Main Area => General GS500 Discussion => Topic started by: pixlgeek on September 22, 2010, 03:32:40 PM

Title: Replacing old tires, Avon AV45/46 110/80 vs 110/70 will both fit?
Post by: pixlgeek on September 22, 2010, 03:32:40 PM
Ahoy GS'ers,

Hope all is well. It's about that time to replace my tires. I'm currently running:

Maxxis iRC RX-01F 110/70-17 54H in the front and
Maxxis Promaxx Street 140/70-17 62H in the back.

I think I've decided on the Avon AV45/46 combo and have started to shop around. I've found a AV45 ST110/70-17 54W for $39! It is on clearance from $139. I've seen most of the threads on here running the 110/80 and was wondering if the 70's would fit and what the major difference would really be in getting them. I mean in saving $100 i think it'd be worth it.

Also, as the rear goes, I've seen people running 140/80 and 150/80 on the rear for the AV46. This seems like a large difference from what I am currently using. If I purchase such a large tire, will this be a direct fitment on my current rim? (Stock rim) What advantages do I have with such a large tire?

Thanks for looking and for the help.  :thumb:

-George
Title: Re: Replacing old tires, Avon AV45/46 110/80 vs 110/70 will both fit?
Post by: scratch on September 22, 2010, 03:37:30 PM
I've rode with both the /70 and the /80.  I prefer the /70, because it gives a quicker turn-in, and is just as stable.  And, it helps bias weight forward, which helps plant the front tire for better traction.

The rear is just for looks.
Title: Re: Replacing old tires, Avon AV45/46 110/80 vs 110/70 will both fit?
Post by: 007brendan on September 22, 2010, 03:41:32 PM
Second number is the height as a percentage of the width, so an 80 would be taller than a 70.  If an 80 fits, than a 70 would fit.  I'm not sure, but I would think that it would lower the front by a bit, and that all things being equal, would wear quicker than an 80, since the circumference would be less and the front wheel and tire would need to spin more at a given mph vs an 80.  It's also possible that the difference is so small that it won't really matter.
Title: Re: Replacing old tires, Avon AV45/46 110/80 vs 110/70 will both fit?
Post by: scratch on September 22, 2010, 03:42:38 PM
The difference is so small that it doesn't matter.
Title: Re: Replacing old tires, Avon AV45/46 110/80 vs 110/70 will both fit?
Post by: pixlgeek on September 22, 2010, 03:45:40 PM
So how about the rear. Does the 150 or 140 fit without modification on the stock rear rim? Thanks for the help guys.
Title: Re: Replacing old tires, Avon AV45/46 110/80 vs 110/70 will both fit?
Post by: 007brendan on September 22, 2010, 03:55:54 PM
Search the forums, it's a well-covered topic.  The 140s will fit.  It depends for the 150s.  I remember hearing that bias ply 150s tend to fit while radials tend not to without modification.  With 150s, you might also need to take a hammer to the torque arm to create some clearance.
Title: Re: Replacing old tires, Avon AV45/46 110/80 vs 110/70 will both fit?
Post by: pixlgeek on September 22, 2010, 03:56:16 PM
OK, just ordered this for the front. This should fit with no issues correct? What a great deal!

http://www.jpcycles.com/product/210-072?N=275212+28003644&Ntt=av45&Ntk=All

And should I pair that with the 140/80 or the 150/80, What differences would I notice between the two?

Thanks.
Title: Re: Replacing old tires, Avon AV45/46 110/80 vs 110/70 will both fit?
Post by: pixlgeek on September 22, 2010, 04:11:04 PM
Alright. Just found a great deal on the 140/80 at DennisKirk.com

Ordered this guy.

http://www.denniskirk.com/jsp/tpl/tire/product.jsp?skuId=&store=&catId=&productId=p541691&leafCatId=&mmyId=

It says one on hand still but i suppose the one I just purchased was that last one.

From what I've shown you guys, do you think this will be a decent combination?

Thanks for the quick replies fellas'.  :bowdown:
Title: Re: Replacing old tires, Avon AV45/46 110/80 vs 110/70 will both fit?
Post by: gsJack on September 22, 2010, 05:51:15 PM
The AV45/46 Azaro-ST line was replaced by the Storm line which was then replaced by the newest Avon Storm 2 sport touring radials.  They quit making the AV45/46 tires a few years ago except for 6 sizes they didn't make in the Storm tires and they include only two 17" size tires, the 110/80-17 front and the 140/80-17 rear which is why most use the 110/80 front now.

http://www.avon-tyres.co.uk/motorcycle/azaro-st

Been quite a while since they made a 110/70-17 front Azaro so make sure you check the date on that one you ordered, it could be quite old.  As far as I know they never made a 150/80-17 Azaro rear but did make and still do make a 150/80-16 Azaro which of course won't fit.

I had a pair of the 110/80 and 140/80 AV45/46 about 6 years ago and really liked them.  A 110/70 front is of course the oem size for the GS500 and a 140/80 is made for a 3.5" preferred rim so it's a good fit on the GS500s which have a 3.5 rear rim.  The approx .8" taller than stock rear Azaro should make the bike noticeably quicker steering.

Title: Re: Replacing old tires, Avon AV45/46 110/80 vs 110/70 will both fit?
Post by: Elijafir on September 22, 2010, 07:40:56 PM
I'm not trying to start anything but I would like to know how 10mm is almost 0.8"?
Title: Re: Replacing old tires, Avon AV45/46 110/80 vs 110/70 will both fit?
Post by: pixlgeek on September 22, 2010, 08:34:16 PM
Quote from: gsJack on September 22, 2010, 05:51:15 PM
The AV45/46 Azaro-ST line was replaced by the Storm line which was then replaced by the newest Avon Storm 2 sport touring radials.  They quit making the AV45/46 tires a few years ago except for 6 sizes they didn't make in the Storm tires and they include only two 17" size tires, the 110/80-17 front and the 140/80-17 rear which is why most use the 110/80 front now.

http://www.avon-tyres.co.uk/motorcycle/azaro-st

Been quite a while since they made a 110/70-17 front Azaro so make sure you check the date on that one you ordered, it could be quite old.  As far as I know they never made a 150/80-17 Azaro rear but did make and still do make a 150/80-16 Azaro which of course won't fit.

I had a pair of the 110/80 and 140/80 AV45/46 about 6 years ago and really liked them.  A 110/70 front is of course the oem size for the GS500 and a 140/80 is made for a 3.5" preferred rim so it's a good fit on the GS500s which have a 3.5 rear rim.  The approx .8" taller than stock rear Azaro should make the bike noticeably quicker steering.



Thanks for the reply jack. So in your opinion, what would be an acceptable age for purchasing this front tire? Also, do you think the purchases I made are a good deal, or should I cancel the order and go with the Storm 2?
Title: Re: Replacing old tires, Avon AV45/46 110/80 vs 110/70 will both fit?
Post by: gsJack on September 23, 2010, 06:25:36 AM
Quote from: Elijafir on September 22, 2010, 07:40:56 PM
I'm not trying to start anything but I would like to know how 10mm is almost 0.8"?

Based on nominal calculated dimensions a 140/80-17 tire is 25.8" in dia and a stock size rear 130/70-17 is 24.2" in dia.  25.8-24.2/2=.8" so the rear axle .8" higher from the ground with the 140/80 resulting in a steeper steering head angle and quicker steering.

(http://img.photobucket.com/albums/v443/jcp8832/CalcTireDims.jpg)

Actual tire dimensions can vary from maker to maker and from model to model from the same maker.  For example a 150/70-17 calculates to be 25.3" in dia and most are close to that size but the 150/70-17 Roadrider currently on my bike measured 25.8" in diameter when new which is about 1/4" taller than most 150/70 tires are.

The 10mm you refer to is the difference in width between a 130/70 and 140/80 tire and not the difference in height.
Title: Re: Replacing old tires, Avon AV45/46 110/80 vs 110/70 will both fit?
Post by: gsJack on September 23, 2010, 07:05:44 AM
Quote from: pixlgeek on September 22, 2010, 08:34:16 PM
Thanks for the reply jack. So in your opinion, what would be an acceptable age for purchasing this front tire? Also, do you think the purchases I made are a good deal, or should I cancel the order and go with the Storm 2?

Hard to say exactly, there are a wide range of opinions on tire life.  Some say never use a tire more that 5 years old and others say never put a tire more than 5 years old on your bike which could make it a lot older when used up and replaced particularly with low milage users.  I asked a couple larger volume tire suppliers what age they considered not too old to sell a tire and they both said about 4 years shelf life was their limit.  But the tires from big volume dealers are much fresher than that in most cases.

I bought my 97 GS new from a dealer in Mar of 99 and it had been sitting on the showroom floor for 2 years and the tires showed small dry rot cracks in the sidewalls and tread bottoms.  I used them for 4 months and 8100 miles before replacing them with BT45s with no problems. I mostly don't buy tires more than 2-3 years old from date of manufacture (marked on tires) and use them up in a year or two at most.  Properly stored in a cool dry place out of the sun the tires will last much longer than those I got on that 97 GS.

That's a good price for the 140/80 AV46 you ordered from Dennis Kirk.  Maybe you could call jpcycles and ask how old that front tire is?  The 150/70 Storms are a bit wider than 150 mm so you most likely would have to bend the brake torque rod for clearance.



Title: Re: Replacing old tires, Avon AV45/46 110/80 vs 110/70 will both fit?
Post by: Elijafir on September 23, 2010, 08:30:47 AM
Quote from: gsJack on September 23, 2010, 06:25:36 AM
The 10mm you refer to is the difference in width between a 130/70 and 140/80 tire and not the difference in height.

So, I am just wrong in thinking that the first number is the tire width in millimeters. The second number is the "sidewall" height in millimeters. The third number is the rim size.   That's what I was taught about tires. 
Title: Re: Replacing old tires, Avon AV45/46 110/80 vs 110/70 will both fit?
Post by: Twism86 on September 23, 2010, 09:12:57 AM
The first number the the tread width in mm, correct. The second number is a % of that tread width for height. So a 110/70 is 110mm wide and 77mm tall. The third number is the rim size.
Title: Re: Replacing old tires, Avon AV45/46 110/80 vs 110/70 will both fit?
Post by: 007brendan on September 23, 2010, 10:51:43 AM
Quote from: Elijafir on September 22, 2010, 07:40:56 PM
I'm not trying to start anything but I would like to know how 10mm is almost 0.8"?

The second number isn't a mm value, it's a percentage.  It's the height as a percentage of the width.

Edit: didn't see that someone had already responded
Title: Re: Replacing old tires, Avon AV45/46 110/80 vs 110/70 will both fit?
Post by: Elijafir on September 23, 2010, 11:07:31 PM
Is that just motorcycles or cars and trucks too?